It is apparent Currys are indulging in a scam involving installation of appliances, especially cookers. They portray themselves as having fully qualified engineers to undertake such jobs but on the day of delivery the chaps who deliver are often not qualified and so starts the painful process of either contacting customer services to arrange another visit or asking for a refund. Avoid at all costs any installation purchases if you are brave enough to buy from this dishonest company. In fact take my advice and avoid this company altogether for the sake of your wallet and mental state. It really is not worth it.